You are implementing LocationListener in your activity MainActivity. The call for concurrent location updates will therefor be like this:

mLocationClient.requestLocationUpdates(mLocationRequest, this);

Be sure that the LocationListener you're implementing is from the google api, that is import this:

import com.google.android.gms.location.LocationListener;

and not this:

import android.location.LocationListener;

and it should work just fine.

It's also important that the LocationClient really is connected before you do this. I suggest you don't call it in the onCreate or onStart methods, but in onResume. It is all explained quite well in the tutorial for Google Location Api: https://developer.android.com/training/location/index.html

First of all those two codes are identical:

Looper looper = Looper.myLooper();
Handler handler = new Handler(looper);

and

Handler handler = new Handler();

if you check the source code you can see that the empty constructor for Handler internally uses Looper.myLooper();

I'm not sure where you think this could would be cancelling a request, after the time passes, you are calling requestLocationUpdates again. So yes, it will keep trying to get GPS lock.

I'll suggest you two methods how you should be doing.

1. This first one is easier but I'm not sure how well it works, as I only used it for passive location updates. Use the expiration on your request, after that expirated time, the location services should quit automatically.

   locationRequest.setExpirationDuration(Constants.LOCATION_TIMEOUT_MS);
   

2. This second is to use the correct method, which is removeLocationUpdates

   locationProvider.removeLocationUpdates(
                mGoogleApiClient, 
                (LocationListener) thisFragment);
   

According to the documentation RuntimeException is called when calling thread has no Looper. Try to call Looper.prepare() before you call LocationManager